Glow discharge is a physical phenomenon that occurs in gases when they are subjected to an electric field. It is characterized by the production of a visible glow as a result of ionization of the gas. Here’s a detailed overview of glow discharge: ### Mechanism 1. **Gas Ionization**: When a voltage is applied across two electrodes in a low-pressure gas, the electric field can accelerate free electrons. These energetic electrons collide with gas atoms, ionizing them by knocking out additional electrons.
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